def test_hist_init():
"""
Tests the __init__ method and getters in ImageHistory
"""
print('Testing history initializer')
import a6image
import a6history
p = pixels.Pixels(6)
p[0] = (255, 0, 0)
p[1] = (0, 255, 0)
p[2] = (0, 0, 255)
p[3] = (0, 255, 255)
p[4] = (255, 0, 255)
p[5] = (255, 255, 0)
image = a6image.Image(p, 2)
hist = a6history.ImageHistory(image)
cornell.assert_equals(id(image), id(hist.getOriginal()))
cornell.assert_equals(type(image), type(hist.getCurrent()))
cornell.assert_not_equals(id(image), id(hist.getCurrent()))
current = hist.getCurrent()
cornell.assert_not_equals(id(p), id(current.getPixels()))
for pos in range(current.getLength()):
cornell.assert_equals(p[pos], current.getPixels()[pos])
cornell.assert_true(hasattr(hist, '_history'))
cornell.assert_equals(list, type(hist._history))
cornell.assert_equals(1, len(hist._history))
def test_hist_edit():
"""
Tests the edit (increment/undo/clear) methods in ImageHistory
"""
print('Testing history edit methods')
import a6image
import a6history
p = pixels.Pixels(6)
p[0] = (255, 0, 0)
p[1] = (0, 255, 0)
p[2] = (0, 0, 255)
p[3] = (0, 255, 255)
p[4] = (255, 0, 255)
p[5] = (255, 255, 0)
image = a6image.Image(p, 2)
hist = a6history.ImageHistory(image)
bottom = hist.getCurrent()
bottom.setPixel(0, 0, (64, 128, 192))
hist.increment()
current = hist.getCurrent()
cornell.assert_equals(bottom.getLength(), current.getLength())
cornell.assert_equals(bottom.getWidth(), current.getWidth())
cornell.assert_not_equals(id(bottom), id(current))
cornell.assert_not_equals(id(bottom.getPixels()), id(current.getPixels()))
for pos in range(current.getLength()):
cornell.assert_equals(bottom.getPixels()[pos],
current.getPixels()[pos])
hist.undo()
cornell.assert_equals(id(bottom), id(hist.getCurrent()))
hist.increment()
hist.increment()
hist.increment()
cornell.assert_equals(4, len(hist._history))
current = hist.getCurrent()
cornell.assert_equals(bottom.getLength(), current.getLength())
cornell.assert_equals(bottom.getWidth(), current.getWidth())
cornell.assert_not_equals(id(bottom), id(current))
cornell.assert_not_equals(id(bottom.getPixels()), id(current.getPixels()))
for pos in range(current.getLength()):
cornell.assert_equals(bottom.getPixels()[pos],
current.getPixels()[pos])
hist.clear()
cornell.assert_not_equals(id(bottom), id(hist.getCurrent()))
cornell.assert_equals(1, len(hist._history))
original = hist.getOriginal()
current = hist.getCurrent()
cornell.assert_equals(original.getLength(), current.getLength())
cornell.assert_equals(original.getWidth(), current.getWidth())
cornell.assert_not_equals(id(original), id(current))
cornell.assert_not_equals(id(original.getPixels()),
id(current.getPixels()))
for pos in range(current.getLength()):
cornell.assert_equals(original.getPixels()[pos],
current.getPixels()[pos])
bottom = hist.getCurrent()
bottom.setPixel(0, 0, (64, 128, 192))
for step in range(hist.MAX_HISTORY + 1):
hist.increment()
cornell.assert_equals(hist.MAX_HISTORY, len(hist._history))
cornell.assert_not_equals(id(bottom), id(hist._history[0]))
def test_image_other():
"""
Tests the copy and swapPixel methods in class Image
"""
print('Testing image extras')
import a6image
p = pixels.Pixels(6)
p[0] = (255, 64, 0)
p[1] = (0, 255, 64)
p[2] = (64, 0, 255)
p[3] = (64, 255, 128)
p[4] = (128, 64, 255)
p[5] = (255, 128, 64)
q = p[:] # Need to copy this
# Test the copy
image = a6image.Image(p, 2)
copy = image.copy()
cornell.assert_equals(image.getLength(), copy.getLength())
cornell.assert_equals(image.getWidth(), copy.getWidth())
cornell.assert_not_equals(id(image), id(copy))
cornell.assert_not_equals(id(image.getPixels()), id(copy.getPixels()))
for pos in range(copy.getLength()):
cornell.assert_equals(image.getPixels()[pos], copy.getPixels()[pos])
# Test swap pixels
image.swapPixels(0, 0, 2, 1)
cornell.assert_equals(q[5], image.getPixel(0, 0))
cornell.assert_equals(q[0], image.getPixel(2, 1))
image.swapPixels(0, 0, 2, 1)
cornell.assert_equals(q[0], image.getPixel(0, 0))
cornell.assert_equals(q[5], image.getPixel(2, 1))
image.swapPixels(0, 1, 2, 0)
cornell.assert_equals(q[4], image.getPixel(0, 1))
cornell.assert_equals(q[1], image.getPixel(2, 0))
image.swapPixels(0, 1, 2, 0)
cornell.assert_equals(q[1], image.getPixel(0, 1))
cornell.assert_equals(q[4], image.getPixel(2, 0))
image.swapPixels(0, 0, 0, 0)
cornell.assert_equals(q[0], image.getPixel(0, 0))
# Test enforcement
good = test_assert(image.swapPixels, ['a', 1, 0, 0],
'You are not enforcing the precondition on row type')
good = good and test_assert(
image.swapPixels, [8, 1, 0, 0],
'You are not enforcing the precondition on row value')
good = good and test_assert(
image.swapPixels, [0, 1, 'a', 0],
'You are not enforcing the precondition on row type')
good = good and test_assert(
image.swapPixels, [0, 1, 8, 0],
'You are not enforcing the precondition on row value')
good = good and test_assert(
image.swapPixels, [0, 'a', 0, 0],
'You are not enforcing the precondition on column type')
good = good and test_assert(
image.swapPixels, [0, 8, 0, 0],
'You are not enforcing the precondition on column value')
good = good and test_assert(
image.swapPixels, [0, 1, 0, 'a'],
'You are not enforcing the precondition on column type')
good = good and test_assert(
image.swapPixels, [0, 1, 0, 8],
'You are not enforcing the precondition on column value')
if not good:
exit()